相片由针孔摄像机摄制于2009年12月中旬到2010年7月中，---使用了刺孔的黑塑料胶片，铝箔，和黑白胶卷。
The photograph was made between mid-December 2009 and mid-June 2010 with a pinhole camera—in this case a punctured black-plastic film canister, aluminum foil, and black-and-white film.
作为优选，所述塑料管、保温层和铝箔的截面为圆形，保温层为PE泡沫材料。
The cross sections of the plastic pipe, the heat-insulating layer and the aluminum foil are round as optimization, and the heat-insulating layer is made of PE foam materials.
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